Smoke Detector(s) Wiring Fault

TASK 26-17-00-810-805-A
Smoke Detector(s) Wiring Fault

1. Possible Causes

wiring

2. Job Set-up Information
A. Referenced Information

REFERENCE	DESIGNATION
ASM 261601
ASM 261701
AMM 31-32-00-860-005	Procedure to Get Access to the SYSTEM REPORT/TEST FIRE PROT Page

3. Fault Confirmation
Subtask 26-17-00-710-058-A ** ON A/C NOT FOR ALL

A. Test
(1) On one MCDU get the SYSTEM REPORT/TEST SDCU menu page AMM 31-32-00-860-005.
(2) On the MCDU:

push the line key adjacent to the <WIRING REPORT indication.

4. Fault Isolation
Subtask 26-17-00-810-064-A ** ON A/C NOT FOR ALL

A. If the SDCU WIRING REPORT page gives the maintenance message NO FAILURE, no other maintenance action is necessary.

Subtask 26-17-00-810-092-A ** ON A/C NOT FOR ALL

B. If the test gives the maintenance message TEST OK, no other maintenance action is necessary.

Subtask 26-17-00-810-065-A ** ON A/C NOT FOR ALL

C. If the SDCU WIRING REPORT page gives the maintenance message(s):

WIRING DEFECT BETWEEN SDCU (10WQ) AND SMOKE DET LAV X (XWQ), and/or
WIRING DEFECT BETWEEN SMOKE DET LAV X (XWQ) AND SMOKE DET LAV X (XWQ), and/or
WIRING DEFECT BETWEEN SMOKE DET LAV X (XWQ) AND SDCU (10WQ) (X = RESP.LAV)
WIRING DEFECT BETWEEN SMOKE DETECTOR (XWH) FWD (OR AFT) LDCC AND
SMOKE DETECTOR (XWH) FWD (OR AFT) LDCC.

Check and repair if necessary the wiring between the SDCU and the related smoke detector
or
Check and repair if necessary the wiring between the related smoke detectors which is shown in the SDCU WIRING REPORT ASM 261701 , ASM 261701, ASM 261701 and ASM 261601.

Subtask 26-17-00-710-059-A ** ON A/C NOT FOR ALL

D. Do the test given in Para. 3.

5. Close-up
Subtask 26-17-00-860-054-A ** ON A/C NOT FOR ALL

A. Put the aircraft back to its initial configuration.

[Rev.8 from Aug 2018] 2026.04.04 04:27:21 UTC